In sdlc we have six phases intial phase,analysis phase,design phase,coding phase,testing phase,delivery and maintance phase this is done in programming part while developing a code these rules are followed.In software testing life cycle(STLC) after develpoing the program this cylce is performed which conists of again 6 phases test planning,test design,test execution,result analysis,bug tracking, reporting.

Compare database development life cycle with system development life cycle